# 1.测试代码
# assertEqual(a, b) 核实a == b
# assertNotEqual(a, b) 核实a != b
# assertTrue(x) 核实x为True
# assertFalse(x) 核实x为False
# assertIn(item, list) 核实item在list中
# assertNotIn(item, list) 核实item不在list中